Toxic potencies of extracts of sediment and settling particulate matter collected in the recipient of a bleached pulp mill effluent before and after abandoning chlorine bleaching

1997 ◽  
Vol 16 (6) ◽  
pp. 1187-1194 ◽  
Author(s):  
Magnus Engwall ◽  
Dag Broman ◽  
Lennart Dencker ◽  
Carina Näf ◽  
Yngve Zebühr ◽  
...  
Keyword(s):  
Particulate Matter ◽  
Pulp Mill ◽  
Pulp Mill Effluent ◽  
Bleached Pulp ◽  
Chlorine Bleaching ◽  
Before And After

Effects of a Pulp Mill Effluent on the Population Dynamics of Perch, Perca fluviatilis

1991 ◽  
Vol 48 (1) ◽  
pp. 28-34 ◽  
Author(s):  
Peter Karås ◽  
Erik Neuman ◽  
Olof Sandström
Keyword(s):  
Posterior Part ◽  
Pulp Mill ◽  
Perca Fluviatilis ◽  
Artificial Substrates ◽  
Pulp Mill Effluent ◽  
Bleached Pulp ◽  
Perch Perca Fluviatilis ◽  
Food And Feeding ◽  
Mortality Causes ◽  
Weight Data

The dynamics of a Baltic perch (Perca fluviatilis) population were studied in a bleached pulp mill effluent area on the Swedish coast. Recruitment was seriously affected, as larval and fry abundances were very low. Studies of spawning on artificial substrates demonstrated that sufficient numbers of eggs were deposited even in the most effluent-exposed parts of the study area. No increased egg mortality could be noted, but at the stage close to hatching about 10% of the embryos were observed to be malformed, generally having sharp bends in the posterior part of the spinal cord. Exposed embryos were generally smaller than reference fishes, both when length and weight data were compared. Larval samplings provided evidence for high mortality at or very close to hatching. Food and feeding conditions appeared to be of little importance for mortality. Two mortality causes were suggested: chronic failure of parental reproductive systems and/or acute toxicity to embryo or early larvae.

Resistance of bound chloroguaiacols and AOX from pulp mill effluent to degradation by Trichoderma harzianum isolated from Lake Bonney, south-eastern South Australia

1996 ◽  
Vol 47 (8) ◽  
pp. 961 ◽  
Author(s):  
JA Van Leeuwen ◽  
BC Nicholson ◽  
KP Hayes ◽  
DE Mulcahy
Keyword(s):  
Trichoderma Harzianum ◽  
Culture Medium ◽  
South Australia ◽  
Pulp Mill ◽  
Pulp Mill Effluent ◽  
Mineral Salts ◽  
Halogenated Organic Compounds ◽  
South Eastern ◽  
Chlorine Bleaching ◽  
Sulfite Pulp

Previous studies have shown that chlorophenolic compounds persisted in water and sediments of Lake Bonney, south-eastern South Australia, following discontinuation of chlorine bleaching at a sulfite pulp mill that discharged effluent into the lake. Although free and bound chlorophenolics were detected in the lake after discontinuation of chlorine bleaching, the predominant forms were found to be bound compounds. In assessing the persistence of chlorophenolics in the lake, fungi were isolated from the lake water and studied for their capacities to degrade these compounds. One fungus, Trichoderma harzianum, was found to be capable of reducing concentrations of spiked (free) 2,4,6-trichlorophenol, 4,5-dichloroguaiacol, 3,4,5-trichloroguaiacol and tetrachloroguaiacol in a mineral salts culture medium and concentrations of adsorbable halogenated organic compounds (AOX) attributable to the spiked compounds. This fungus was also found to be capable of dehalogenating free tetrachloroguaiacol in a mineral salts medium. Degradation of bound chloroguaiacols present in chlorination-stage effluent from the mill by Trichoderma harzianum was not detected in this study. The inability of this fungus to degrade bound chlorophenolics demonstrates the resistance of these compounds in bound form to biodegradation and may explain the persistence of some chlorophenolics in Lake Bonney.

Recovery of ovary size, follicle cell apoptosis, and HSP70 e×pression in fish e×posed to bleached pulp mill effluent

2001 ◽  
Vol 58 (3) ◽  
pp. 620-625 ◽  
Author(s):  
David M. Janz ◽  
Mark E. McMaster ◽  
Lynn P. Weber ◽  
Kelly R. Munkittrick ◽  
Glen Van Der Kraak
Keyword(s):  
Cell Apoptosis ◽  
Pulp Mill ◽  
Follicle Cell ◽  
Pulp Mill Effluent ◽  
Bleached Pulp

Effects of a Bleached Pulp Mill Effluent on Growth and Gonad Function in Baltic Coastal Fish

1988 ◽  
Vol 20 (2) ◽  
pp. 107-118 ◽  
Author(s):  
O. Sandström ◽  
E. Neuman ◽  
P. Karås
Keyword(s):  
Gonad Development ◽  
Pulp Mill ◽  
Reproductive Capacity ◽  
Pulp Mill Effluent ◽  
Coastal Fish ◽  
Bleached Pulp ◽  
Somatic Condition ◽  
Length Increase ◽  
Pulp Mill Effluents ◽  
Gonadal Recrudescence

Growth and reproductive capacity in perch (Percafluviatilia L.) and roach (Rutilusrutilus (L.)) were studied during 1983, 1984 and 1985 in a coastal area of the Bothnian Sea affected by bleached pulp mill effluents. Comparative investigations were made at a mill producing unbleached pulp. In perch exposed to bleachery effluents effects were observed on length increase rates, somatic condition factors and on gonad development. The fraction of fishes displaying inhibited gonadal recrudescence was high close to the mill, and the size of developing gonads was comparatively small. Growth was faster in exposed fishes, in young-of-the-year as well as in older fish. Effects on length growth could be distinguished as far back as in 1975. Energy storage, expressed as the condition factor, was highest in exposed fishes. The effect pattern was more diffuse in roach, but examples of reduced gonad growth were noted. In conclusion, these studies provided evidence for changes in the energy allocation system in fish exposed to a bleached pulp mill effluent.

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